xworm | d56871854edc765cabbec4c94213e48018f06ac3e05ad688aeda733299b8c9e8

General

Target

XClient.exe
Size

78KB
MD5

dcb1c6ea097c0b99326a533ef8dcb99c
SHA1

0c32ff7d84de2e561fdff0920e4dffefae2a6701
SHA256

d56871854edc765cabbec4c94213e48018f06ac3e05ad688aeda733299b8c9e8
SHA512

92f6d308aca63a7974ade9a8ebbfcb994ddccbc7e3da016fb94f99d39feb7802e4ab5c3efa7b94212e4d29477470852ea21c4c5a6a920b166f21fb2ef4d6e8a4
SSDEEP

1536:qUzKKr1fw6QryHIKyMLqp+WSpNUnFbBf8mDf86MsbwOAOpY97Dfs9ijlzGI:TKe7Q9RMLPvpUFbBUuFwO/q97DHjpGI

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Family

xworm

C2

provides-reduces.gl.at.ply.gg:6197

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2376-1-0x0000000000D80000-0x0000000000D9A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
512	powershell.exe
2456	powershell.exe
3044	powershell.exe
2900	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
14	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
512	powershell.exe
512	powershell.exe
2456	powershell.exe
2456	powershell.exe
3044	powershell.exe
3044	powershell.exe
2900	powershell.exe
2900	powershell.exe
2376	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	XClient.exe
Token: SeDebugPrivilege	512	powershell.exe
Token: SeDebugPrivilege	2456	powershell.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeDebugPrivilege	2376	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2376	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 512	2376	XClient.exe	87
PID 2376 wrote to memory of 512	2376	XClient.exe	87
PID 2376 wrote to memory of 2456	2376	XClient.exe	89
PID 2376 wrote to memory of 2456	2376	XClient.exe	89
PID 2376 wrote to memory of 3044	2376	XClient.exe	92
PID 2376 wrote to memory of 3044	2376	XClient.exe	92
PID 2376 wrote to memory of 2900	2376	XClient.exe	94
PID 2376 wrote to memory of 2900	2376	XClient.exe	94

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3044
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2900

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
3505effaead0f06d098f1aec01836881

SHA1
94bafdbeb2f5adbd8cec709574df5b8dbcc5eba3

SHA256
5d39a25ff8842c7c14aa14f99c5e3e1606fb7516c57f03dc41069df3c3de0517

SHA512
934d8eab5bc2ec20e800c668f3c3434829feade4771918a22d712f7ba39f91f93877a1e9dc1beac966646af0c9dd2cf118041535143b3abc585fea8dfb1299f5

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
10890cda4b6eab618e926c4118ab0647

SHA1
1e1d63b73a0e6c7575f458b3c7917a9ce5ba776d

SHA256
00f8a035324d39bd62e6dee5e1b480069015471c487ebee4479e6990ea9ddb14

SHA512
a2ee84006c24a36f25e0bca0772430d64e3791f233da916aecdeae6712763e77d55bbbd00dc8f6b2b3887f3c26ab3980b96c5f46cc823e81e28abbbc5fc78221

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5sgtqehg.ozc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/512-8-0x00000200CA1E0000-0x00000200CA202000-memory.dmp

Filesize
136KB

Download
memory/512-14-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/512-15-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/512-16-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/512-19-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/512-9-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/2376-0-0x00007FFE23A13000-0x00007FFE23A15000-memory.dmp

Filesize
8KB

Download
memory/2376-2-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download
memory/2376-1-0x0000000000D80000-0x0000000000D9A000-memory.dmp

Filesize
104KB

Download
memory/2376-58-0x00007FFE23A13000-0x00007FFE23A15000-memory.dmp

Filesize
8KB

Download
memory/2376-59-0x00007FFE23A10000-0x00007FFE244D1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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